高速移动平台雷达式通信自适应波形设计研究

发布时间：2018-06-15 18:29

本文选题：雷达式通信 + 波形方案　；参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：突飞猛进的科技发展与进步,现有作战平台面临的挑战越来越多。面临众多的威胁,大量的雷达与通信设备被加载到作战平台上。鉴于雷达与通信两系统兼容性,为了提高作战平台的机动性和轻便性,雷达通信一体化的研究日趋深入。日前,雷达通信一体化系统已经逐渐渗透到军用、民用等各个领域。在分析雷达与通信异同和实现机制前提下,给出实现雷达式通信的具体方式,使一体化系统分时或分波束完成雷达探测功能和通信系统信息传输功能。同时,归纳一体化系统的发展及其波形方案的研究现状,分析得知其均没有考虑到高速移动平台下多普勒频移对雷达式通信的影响。因此,本文重点是针对高速移动平台设计可靠有效的雷达式通信波形方案。基于多普勒频移对雷达式通信的影响,分析传统抗频移算法并仿真比较,给出一种双差分对抗多普勒频移的方法。之后从理论上推导双差分对抗频移和噪声性能。结合实际工程应用,提出改进相位法来实现双差分,并仿真分析其性能。参考IEEE802.11,提出了双差分技术分别结合单载波调制、多载波调制以及扩频调制的雷达式通信波形方案。对于双差分技术结合单载波调制方案,分析BPSK、QPSK、8PSK分别结合双差分技术的性能;对于双差分技术结合多载波调制方案,分析OFDM调制在不同子载波数、不同基带调制方式时结合双差分技术的性能;对于双差分技术结合扩频调制方案,分析直接序列扩频、正交补码键控、分组二进制卷积码三种扩频方式分别结合双差分技术的性能。除对方案理论说明外,还基于Matlab、GNU Radio软件平台分别对其抗频移和噪声性能进行仿真比较和实际测试,最后给出它们的应用条件。综上表明,一体化系统采用的上述不同方案,在保障高速移动平台下可靠有效雷达式通信时,其所需要信噪比及能达到的通信速率均不同,从而应用场合也不同。因此一体化系统可根据实际情况,自适应地从上述备选方案中选取最优波形方案,以满足对应高速运动环境中不同性能指标的雷达式通信需求。
[Abstract]:With the rapid development and progress of science and technology, the existing combat platforms are facing more and more challenges. In the face of many threats, a large number of radar and communications equipment has been loaded into the combat platform. In view of the compatibility between radar and communication systems, in order to improve the maneuverability and portability of combat platform, the research of radar communication integration is getting deeper and deeper. A few days ago, radar communication integration system has gradually penetrated into military, civilian and other fields. On the premise of analyzing the similarities and differences between radar and communication and the realization mechanism, this paper gives the concrete way of realizing radar communication, which makes the integrated system complete radar detection function and communication system information transmission function by time-sharing or beam-sharing. At the same time, the development of integrated system and the research status of waveform scheme are summarized, and it is found that the influence of Doppler frequency shift on radar communication under high-speed mobile platform has not been taken into account. Therefore, this paper focuses on designing a reliable and effective radar communication waveform scheme for high-speed mobile platform. Based on the influence of Doppler frequency shift on radar communication, the traditional anti-Doppler frequency shift algorithm is analyzed and compared with simulation. Then, the frequency shift and noise performance of double differential countermeasure are deduced theoretically. Combined with practical engineering application, an improved phase method is proposed to realize double difference, and its performance is analyzed by simulation. Referring to IEEE 802.11, a radar waveform scheme combining single-carrier modulation, multi-carrier modulation and spread spectrum modulation is proposed. For the double differential technique combined with the single carrier modulation scheme, the performance of the BPSKO QPSK 8PSK combined with the double differential technique is analyzed, and for the dual differential technique combined with the multi-carrier modulation scheme, the number of OFDM modulation in different subcarriers is analyzed. The performance of combining double difference technique with different baseband modulation methods, and analyzing the direct sequence spread spectrum, orthogonal complementary code keying for the double differential technique combined with spread spectrum modulation scheme, The performance of block binary convolutional code with three spread spectrum methods combined with double differential technique respectively. In addition to the theoretical explanation of the scheme, the performance of anti-frequency shift and noise is simulated and tested based on Matlab GNU Radio software platform. Finally, their application conditions are given. It is shown that the different schemes used in the integrated system can guarantee reliable and effective radar communication under the high-speed mobile platform, the SNR and the communication rate are different, so the application situation is different. Therefore, the integrated system can adaptively select the optimal waveform scheme from the above options according to the actual situation, in order to meet the radar communication requirements corresponding to different performance indicators in the high-speed moving environment.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN957.53

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